Model
Model explorer
Solar Mini 4
CLOSEDUpstage · SOLAR family · released Sep 22, 2026
Upstage's compact agent-oriented MoE (35B total / 3B active) with a 512K context window and 128K max output, supporting English, Korean and Japanese. Released 2026-09-22 per the Console version id solar-mini4-260922; the English launch blog is dated October 1, 2026. Reasoning is off by default and controlled via reasoning_effort. Available via Upstage Console API, Solar Chat, OpenRouter and on-prem; no weights on Upstage's Hugging Face org.
ReasoningCodingVisionFunction callingTool useAgentic
2037.4
Elo · unrated
Parameters
35B
Active params
3B (MoE)
Context
512K tokens
Architecture
Mixture-of-Experts (35B total / 3B active), pretrained from scratch by Upstage; reasoning off by default, reasoning_effort selectable
License
Proprietary
Languages
3+
API price (in/out)
$0.1 / $0.4
Modalities
text
Benchmark results
Bar shows position within the tracked field; marker = field best
best: Claude Opus 5.5 · 67.7%
best: Step 5 Preview · 58.9%
Run it locally
Closed weights — available via API only. No local deployment.
Input / M tok
$0.1
Output / M tok
$0.4
SOLAR family
Elo progression across releases
API price $0.1/$0.4 · each benchmark row carries its own source badge (see methodology)